Готові списки джерел за темами / Thiocarbonyl Group

Добірка наукової літератури з теми "Thiocarbonyl Group"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Thiocarbonyl Group"

Kirby, Christopher W., Michael D. Lumsden, and Roderick E. Wasylishen. "A solid-state 13C NMR and theoretical investigation of carbonyl and thiocarbonyl carbon chemical shift tensors." Canadian Journal of Chemistry 73, no. 4 (April 1, 1995): 604–13. http://dx.doi.org/10.1139/v95-078.

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The carbon chemical shift tensors of the carbonyl and thiocarbonyl groups of acetamide, thioacetamide, thioacetanilide, 4′-methoxyacetanilide, and 4′-methoxythioacetanilide have been experimentally determined using dipolar – chemical shift solid-state 13C NMR spectroscopy. The magnitudes of the three principal components of the carbon chemical shift tensors are found to exhibit marked variations between the carbonyl and thiocarbonyl functionalities. However, in contrast to the conclusions of an earlier comparative investigation involving benzophenone and thiobenzophenone, the orientations of the principal axis systems of these chemical shift tensors are found to be similar. These experimental results represent the first complete characterizations of the carbon chemical shift tensor in organic thiocarbonyls. The results of our ab initio GIAO and LORG calculations of carbon chemical shielding tensors in formaldehyde, thioformaldehyde, formamide, and thioformamide as well as in acetamide and thioacetamide are in qualitative agreement with experiment. The findings of the present investigation provide conclusive evidence that the well-known isotropic deshielding of the carbon nucleus in the C=S group relative to C=O is primarily attributable to the decreased energy associated with the σ ↔ π* excitation within the thiocarbonyl fragment. This result is in contrast with the conventional interpretation that the deshielding originates from a red shift in the C=S HOMO–UMO n → π* transition. Keywords: chemical shift tensors, solid-state 13C NMR, carbonyls, thiocarbonyls, ab initio calculations.

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MOLINA, M. T., M. YANEZ, O. MO, R. NOTARIO, and J. L. M. ABBOUD. "ChemInform Abstract: The Thiocarbonyl Group." ChemInform 29, no. 13 (June 23, 2010): no. http://dx.doi.org/10.1002/chin.199813281.

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Fernandez, José Manuel García, and Carmen Ortiz Mellet. "The Thiocarbonyl Group in Carbohydrate Chemistry." Sulfur reports 19, no. 1 (September 1996): 61–159. http://dx.doi.org/10.1080/01961779608047905.

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Corsaro, Antonino, and Venerando Pistarà. "Conversion of the thiocarbonyl group into the carbonyl group." Tetrahedron 54, no. 50 (December 1998): 15027–62. http://dx.doi.org/10.1016/s0040-4020(98)00880-1.

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Crich, David, and Leticia Quintero. "Radical chemistry associated with the thiocarbonyl group." Chemical Reviews 89, no. 7 (November 1989): 1413–32. http://dx.doi.org/10.1021/cr00097a001.

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Kook Sohn, Chang, Eun Kyung Ma, Chang Kon Kim, Hai Whang Lee, and Ikchoon Lee. "Theoretical studies on thiocarbonyl group transfer reactions." New Journal of Chemistry 25, no. 6 (2001): 859–63. http://dx.doi.org/10.1039/b010202o.

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Huang, Chun-Hao, Pei-Jhen Wu, Kun-You Chung, Yi-An Chen, Elise Y. Li, and Pi-Tai Chou. "Room-temperature phosphorescence from small organic systems containing a thiocarbonyl moiety." Physical Chemistry Chemical Physics 19, no. 13 (2017): 8896–901. http://dx.doi.org/10.1039/c7cp00074j.

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Abram, Ulrich, and Bernd Lorenz. "Thiocarbonyl Complexes of Rhenium. Part I." Zeitschrift für Naturforschung B 48, no. 6 (June 1, 1993): 771–77. http://dx.doi.org/10.1515/znb-1993-0611.

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Novel rhenium complexes with terminal thiocarbonyl groups have been synthesized from ReCl3(Me2PhP)3 and sodium diethyldithiocarbamate. mer-(Diethyldithiocarbamato)tris-(dimethylphenylphosphine)(thiocarbonyl)rhenium(I), mer-[Re(CS)(Me2PhP)3(Et2dtc)], and tris(diethyldithiocarbamato)(thiocarbonyl)rhenium(III), [Re(CS)(Et2dtc)3] have been studied by infrared and NMR spectroscopy, mass spectrometry and X-ray diffraction.mer-[Re(CS)(Me2PhP)3(Et2dtc)] crystallizes orthorhombic in the space group Pna21 with a = 1516.1(2), b = 2189.8(2) and c = 1035.6(1) pm. Structure solution and refinement converged at R = 0.042. The coordination geometry is a distorted octahedron. The Re—C bond length is found to be 184(2) pm.[Re(CS)(Et2dtc)3] crystallizes monoclinic in the space group P21/c with a = 962.2(6), b = 1744.0(2), c = 1537.4(6) pm and β = 96.21(1)°. The final R value is 0.028. In the monomeric complex the rhenium atom is seven-coordinate with an approximate pentagonal-bipyramidal coordination sphere and a rhenium-carbon distance of 181(1) pm.

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Barton, Derek H. R., Peter I. Dalko, and Stephan D. Géro. "Radical cation reactions associated with the thiocarbonyl group." Tetrahedron Letters 33, no. 14 (March 1992): 1883–86. http://dx.doi.org/10.1016/s0040-4039(00)74167-0.

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GARCIA FERNANDEZ, J. M., and C. ORTIZ MELLET. "ChemInform Abstract: The Thiocarbonyl Group in Carbohydrate Chemistry." ChemInform 28, no. 28 (August 3, 2010): no. http://dx.doi.org/10.1002/chin.199728234.

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Дисертації з теми "Thiocarbonyl Group"

Lin, Mei-Huei, and 林浼憓. "A stereoselective glycosylation assisted by using thiocarbonyl as the auxiliary group." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/f37j9b.

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碩士
國立臺灣科技大學
化學工程系
106
Deoxy sugar is a core structure dominating an important role in living organisms. However, the mechanism is still unclear because of low yield and poor selectivity in organic synthesis. To achieve these challenges, a one pot synthetic strategy was established by using phenyl thionocarbonyl group. First, with a single step, the phenoxythiocarbonyl donor, a precursor of deoxy sugar, was obtained in high yield. Secondly, phenoxythiocarbonyl donor was employed to achieve stereoselective glycosylation by using neighboring group participation. Finally, the reaction mechanism was clarified in low temperature NMR experiments, and phenyl thionocarbonyl group was applied to control high -selective glycosylation in wide disaccharide molecules.

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CHANG, YA-JOU, and 張雅柔. "The Development of Preactivation Time-Dependent Stereoselective Glycosylation Reaction with 3, 4-Thiocarbonyl Group." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/49z5ju.

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碩士
國立中正大學
化學暨生物化學研究所
108
The carbohydrates play an important role in bio-organism. They not only provide and store energy for daily activities, but also regulate many physiological functions with the others biomolecule on cell surface. To further study the mechanism of carbohydrates in organisms, making a correct stereoselectivity compound during synthesizing is an important work. In the way of organic synthesis, it can be divided to two methods depending on the order of adding activated reagent, one is nonpreactivation, the other is preactivation. The stereoselectivity may be influenced by preactivation time, because the different preactivation time may lead to the different ratio between the kinetic and thermodynamic intermediate. In this thesis,we designed three different functional group donors to study the relationship between preactivation time and stereoselectivity. The results showed that 3, 4-carbonyl and 3, 4-thiocarbonyl donor have the opposite trends of stereoselectivity with different preactivation time. Based on the experimental result, it could be suggested that the intermediate may affect the stereoselectivity. On the other hand, when different acceptors was glycosylated by 3, 4-thiocarbonyl galactoside with the different preactivation time, we could get various trends of stereoselectivity. According to this trends, acceptors could be classified to three types: high reactivity organic small molecule, high reactivity carbohydrate and poor reactivity carbohydrate.

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Частини книг з теми "Thiocarbonyl Group"

Sato, S., and N. Furukawa. "Thiocarbonyl as Functional Group." In Four Carbon-Heteroatom Bonds, 1. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-018-01031.

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Manyem, S., and M. P. Sibi. "Intramolecular Transfer of Sulfur from a Thiocarbonyl Group." In Three Carbon-Heteroatom Bonds: Esters and Lactones; Peroxy Acids and R(CO)OX Compounds; R(CO)X, X=S, Se, Te, 1. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-021-00531.

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Barluenga, José, Eduardo Rubio, and Miguel Tomás. "Functions Containing a Thiocarbonyl Group Bearing Two Heteroatoms Other Than a Halogen or Chalcogen." In Comprehensive Organic Functional Group Transformations, 569–85. Elsevier, 1995. http://dx.doi.org/10.1016/b0-08-044705-8/00228-4.

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Barluenga, J., E. Rubio, and M. Tomás. "Functions Containing a Thiocarbonyl Group Bearing Two Heteroatoms Other Than a Halogen or Chalcogen." In Comprehensive Organic Functional Group Transformations II, 545–72. Elsevier, 2005. http://dx.doi.org/10.1016/b0-08-044655-8/00139-2.

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Kleinpeter, Erich, and Kalevi Pihlaja. "Functions Containing a Thiocarbonyl Group and at Least One Halogen; Also at Least One Chalcogen and No Halogen." In Comprehensive Organic Functional Group Transformations, 527–67. Elsevier, 1995. http://dx.doi.org/10.1016/b0-08-044705-8/00273-9.

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Kleinpeter, E. "Functions Containing a Thiocarbonyl Group and at Least One Halogen; Also at Least One Chalcogen and No Halogen." In Comprehensive Organic Functional Group Transformations II, 495–544. Elsevier, 2005. http://dx.doi.org/10.1016/b0-08-044655-8/00138-0.

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Kantlehner, W. "Transformation of Carbonyl or Thiocarbonyl Groups into Methylene Groups." In Three Carbon-Heteroatom Bonds: Amides and Derivatives; Peptides; Lactams, 1. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-022-00951.

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Wakefield, Basil J. "Carbophilic Addition of Organomagnesium Compounds to Thiocarbonyl Groups." In Organomagnesium Methods in Organic Synthesis, 147–50. Elsevier, 1995. http://dx.doi.org/10.1016/b978-012730945-3.50009-8.

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Tracey, M. R., R. P. Hsung, J. Antoline, K. C. M. Kurtz, L. Shen, B. W. Slafer, and Y. Zhang. "Tungsten(0)-Mediated Coupling of Thiocarbonyl and Thioacetal Groups." In Three Carbon-Heteroatom Bonds: Esters and Lactones; Peroxy Acids and R(CO)OX Compounds; R(CO)X, X=S, Se, Te, 1. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-021-00392.

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Hall, D. G., and H. Zheng. "Addition of Diboron Species to Carbonyl or Thiocarbonyl Groups, or Aldimines." In Boron Compounds, 1. Georg Thieme Verlag KG, 2011. http://dx.doi.org/10.1055/sos-sd-106-00011.

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